No, that's definitely not a job for anyone but an experienced ring & pinion installer. I have a garage full of tools, welder, etc. and do my own work but I won't do a ring & pinion installation. Out of the dozen techs at my two local 4x4 shops, they only trust 1-2 techs in each shop well enough to do ring & pinion installations.
Half of the cost I quoted above is just for labor.